I have a bullet and the trailrenderer following it. I want to add collision to this beam.

created something like a laser beam. It has an invisible bullet at its tip. My problem is that I can't add collisions to the trail renderer that follows it.

CodePudding user response：

To add collision to a trail renderer in Unity, you can use the Collider component. This component allows you to define the shape and size of the collider, and will detect collisions with other colliders in the scene.

Here is an example of how you can add a collider to your trail renderer:

Select the game object that has the trail renderer attached to it. In the Inspector window, click on the "Add Component" button. In the "Physics" section, select the "Box Collider" or "Mesh Collider" component, depending on the shape of your trail renderer. Adjust the size and shape of the collider to match the trail renderer. Make sure that the "Is Trigger" checkbox is unchecked, so that the collider will generate collision events. Once you have added the collider to your trail renderer, you can handle collision events in your script by using the OnCollisionEnter, OnCollisionExit, and OnCollisionStay methods. These methods will be called when the collider collides with other colliders in the scene.

For more information about colliders and collision events in Unity, you can refer to the official documentation here: https://docs.unity3d.com/Manual/CollidersOverview.html

CodePudding user response：

To add collision to the trail renderer, you will need to create a mesh collider for the trail renderer. A mesh collider allows an object to have a complex 3D shape, rather than just a simple geometric shape like a sphere or box collider.

To create a mesh collider for the trail renderer, follow these steps:

In the Unity editor, select the GameObject that has the trail renderer component attached to it.

In the Inspector window, click on the "Add Component" button and search for "Mesh Collider".

Click on the "Mesh Collider" component to add it to the GameObject.

In the "Mesh Collider" component settings, set the "Convex" option to "True" to enable the collider to be treated as a convex shape.

Set the "Material" option to a suitable physics material that defines the properties of the collider, such as its bounciness and friction.

In the "Cooking Options" section, set the "Cooking" option to "Dynamic" to enable the mesh collider to be updated in real-time as the trail renderer changes.

In the "Mesh" section, set the "Mesh" option to "Generate" to generate a mesh for the collider based on the shape of the trail renderer.

Save the changes to the GameObject and run the scene to test the collision behavior of the trail renderer.

By following these steps, you can create a mesh collider for the trail renderer and add collision to the trail renderer. This will allow other objects in the scene to interact with the trail renderer and the beam it represents.